PERC-UPC - Power Electronics Research Centre
Total activity: 3754
Type
Research group
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Specific research center
Acronym
PERC
Address
ETSEIB. Edifici H. Despatx 9-24. Av. Diagonal, 647 Open in new window
City
Barcelona
URL
http://held.perc.upc.edu/?set_language=es Open in new window
Keywords
PERC-UPC - Centre de Recerca d'Electrònica de Potència UPC

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1 to 50 of 3754 results
  • RTC-2014-3089-3-Anualitat 2017

     Romeral Martinez, Jose Luis
    Competitive project

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  • RTC-2014-3089-3-Anualitat 2016

     Romeral Martinez, Jose Luis
    Competitive project

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  • RTC-2014-3089-3-Anualitat 2015

     Romeral Martinez, Jose Luis
    Competitive project

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  • E-01238

     Bordonau Farrerons, Jose
    Competitive project

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  • The Growing state of distributed generation and microgrids in the Ibero-American region: a view from the RIGMEI network

     Castilla Fernandez, Miguel; Gomes, Mario; Mercado, Pedro; Moreira, Carlos; Negroni Vera, Juan José; Sosa, Jorge; Zambroni de Sousa, Antonio Carlos
    IEEE PES Transmission & Distribution Conference and Exposition
    p. 1-6
    Presentation's date: 2014-09-11
    Presentation of work at congresses

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    The Ibero-American Network of Distributed Generation and Intelligent Electrical Microgrids is a thematic network of the CYTED programme that performs cooperation activities between leading companies and research groups of the Ibero-American countries in the renewable energy area. This paper presents the results and conclusions of a study carried out recently by the network, which focused on the state of penetration of the distributed generation and the electrical microgrids in the Ibero-American countries that collaborate with the network. A list of these countries, together with the contact details of the main researchers, can be found in Apendix I.

  • Observation of chaotic behavior in automatic tuning loops for continuous-time filters

     Martínez García, Herminio; Cosp Vilella, Jordi; Manzanares Brotons, Manuel
    IEEE International Midwest Symposium on Circuits and Systems
    p. 742-745
    DOI: 10.1109/MWSCAS.2013.6674756
    Presentation's date: 2014-08
    Presentation of work at congresses

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    he appropriate linear dynamic modeling of continuous-time filters (CTFs) with automatic tuning loops should be obtained to assure stability in case an improved design of the loop controllers is to be carried out. With this aim, starting from a general and systematic analysis in order to obtain an equivalent small-signal linearized incremental model, from which transfer functions between output variables and control voltages are derived, the subsequent design of compensated loops with enhanced stability and dynamic performance is required. This systematic procedure allows obtaining improved controllers for the two involved control loops. However, CTFs with automatic tuning loops are nonlinear feedback systems with potential instability. What is more, nonlinear phenomena, which cannot be predicted by a design-oriented small signal modeling approach, are observed in this kind of tuning systems. The purpose of this work is to highlight that when control parameters are varied, the system could present different kinds of dynamical nonlinear phenomena such as bifurcations and chaotic behavior, which cannot be predicted by the small signal design-oriented model.

  • Optimization of WPT efficiency using a conjugate load in non-impedance matched systems.

     Chabalko, Matthew; Alarcon Cot, Eduardo Jose; Bou Balust, Elisenda; Ricketts, David S.
    IEEE International Symposium on Antennas and Propagation
    p. 645-646
    DOI: 10.1109/APS.2014.6904653
    Presentation's date: 2014-07-06
    Presentation of work at congresses

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    Maximum power transfer and maximum efficiency are two important design constraints in wireless power transfer applications. Several works have investigated the proper load and impedance match conditions to optimize either efficiency or power transfer. In this paper we show that the optimal load for maximum power transfer and maximum efficiency is the same (a conjugate matched load) when the source resistance is zero. This is important, as many WPT systems have a relatively low, unknown source impedance. Since the optimal load for both efficiency and power is the same as the source impedance approaches zero, the designer can use a bi-conjugate load for a near optimal design for both maximum power and efficiency. As the source impedance becomes significant, the bi-conjugate matched system provides higher power, but at the expense of lower efficiency. Maximum efficiency is achieved with a non-bi-conjugate load, when the source impedance is non-negligible.

  • De la teoría a la práctica: cinco años después de la integración de la competencia genérica de sostenibilidad en el Grado en Ingeniería Informática  Open access

     Garcia Almiñana, Jordi; Sanchez Carracedo, Fermin; Lopez Alvarez, David; Vidal Lopez, Eva Maria; Cabre Garcia, Jose Maria; García García, Helena; Alier Forment, Marc
    Jornadas de Enseñanza Universitaria de la Informática
    p. 253-260
    Presentation's date: 2014-07-09
    Presentation of work at congresses

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    La sostenibilidad es una de las competencias trans- versales básicas que todo ingeniero debería adquirir durante su formación. De hecho, seguir desarrollando ciencia y tecnología de espaldas a la sostenibilidad provocaría en poco tiempo un colapso de nuestro planeta. La puesta en marcha del Espacio Europeo de Educación Superior (EEES) ha propiciado una opor- tunidad única para replantearse diferentes aspectos educativos, entre los cuales destaca la inclusión de esta competencia en los planes de estudio. Existe literatura abundante sobre estrategias y pro- puestas teóricas para incluir esta competencia en las ingenierías. Sin embargo, pocos trabajos han sido llevados a cabo desde una perspectiva más práctica. La Facultat de Informàtica de Barcelona (FIB) posee amplia experiencia en el diseño de titulaciones adap- tadas al EEES y ha integrado la sostenibilidad en su plan de estudios de Grado en Ingeniería Informática. En este trabajo se revisa el proceso de diseño del plan de estudios de Grado en Ingeniería Informática de la FIB, aprobado en el año 2009, y se analiza la experiencia de integración de la sostenibilidad tras cinco años de funcionamiento del grado. Se comentan los mecanismos de organización y coordinación entre las asignaturas implicadas y, finalmente, se extraen las lecciones aprendidas.

    La sostenibilidad es una de las competencias transversales básicas que todo ingeniero debería adquirir durante su formación. De hecho, seguir desarrollando ciencia y tecnología de espaldas a la sostenibilidad provocaría en poco tiempo un colapso de nuestro planeta. La puesta en marcha del Espacio Europeo de Educación Superior (EEES) ha propiciado una oportunidad única para replantearse diferentes aspectos educativos, entre los cuales destaca la inclusión de esta competencia en los planes de estudio. Existe literatura abundante sobre estrategias y propuestas teóricas para incluir esta competencia en las ingenierías. Sin embargo, pocos trabajos han sido llevados a cabo desde una perspectiva más práctica. La Facultat de Informàtica de Barcelona (FIB) posee amplia experiencia en el diseño de titulaciones adaptadas al EEES y ha integrado la sostenibilidad en su plan de estudios de Grado en Ingeniería Informática. En este trabajo se revisa el proceso de diseño del plan de estudios de Grado en Ingeniería Informática de la FIB, aprobado en el año 2009, y se analiza la experiencia de integración de la sostenibilidad tras cinco años de funcionamiento del grado. Se comentan los mecanismos de organización y coordinación entre las asignaturas implicadas y, finalmente, se extraen las lecciones aprendidas.

    SUMMARY -- Sustainability is one of the basic professional skills that every engineer should incorporate during their training. In fact, developing science and technology without sustainability criteria would collapse our planet. The launching of the European Higher Education Area (EHEA) has provided a unique opportunity to rethink different educational aspects, including the integration of this skill into the curriculum. Abundant literature exists on strategies and theoretical proposals to include this skill into engineering. However, few studies have been done from a more practical perspective. The Barcelona School of Informatics (FIB) has wide experience in the design of degrees according to the EHEA, and has integrated sustainability into the Informatics Engineering degree. This paper reviews the process of the design of the FIB’s Informatics Engineering degree curriculum, approved in 2009, and analyses the experience of sustainability integration after five years. The organizational and coordination mechanisms between the subjects are discussed, and finally the lessons learnt are extracted.

  • La experiencia del equipo ETSEIB-ELISAVA en la Barcelona Smart Moto Challenge: Un proyecto Learning-by-doing de diseño e ingeniería

     Moreno Eguilaz, Juan Manuel; Garcia Espinosa, Antonio; Riba Ruiz, Jordi Roger; Ortega Redondo, Juan Antonio; Romeral Martinez, Jose Luis; Hernandez Chiva, Emilio
    Congrés Internacional de Docència Universitària i Innovació
    Presentation's date: 2014-07-02
    Presentation of work at congresses

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  • Fault Diagnosis and Fault Tolerant Control of Multiphase Voltage Source Converters For Application in Traction Drives  Open access

     Salehifar, Mehdi
    Department of Electronic Engineering, Universitat Politècnica de Catalunya
    Theses

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    Hay una creciente demanda de vehículos con menor impacto ambiental y una mayoreficiencia de combustible. Para cumplir estos requisitos, la electrificación del transporte se ha introducido en la academia y la industria en los últimos años. Vehículos eléctricos y vehículos eléctricos híbridos son dos ejemplos prácticos en los sistemas de transporte.El tren de potencia típico en los vehículos eléctricos se compone de tres partes principales, incluyendo la fuente de energía, la electrónica de potencia y un motor eléctrico. En cuanto a la máquina, de imán permanente motores son la opción dominante para vehículos híbridos ligeros en la industria debido a su mayor eficiencia y densidad de potencia. Con el fin de operar el tren de potencia, la máquina eléctrica se puede suministrar y controlado por un inversor de fuente de tensión. El convertidor se somete a diversos tipos de fallos. Según las estadísticas, 38 % de las fallas en un motor se deben al convertidor de potencia.Por otro lado, el tren de potencia eléctrica debe cumplir con un alto nivel de fiabilidad.Máquinas multifase PM pueden cumplir con los requisitos de fiabilidad debido a suscaracterísticas de tolerancia a fallos. La máquina puede seguir siendo operativo con fallas en múltiples fases. En consecuencia, para realizar una unidad de motor de alta disponibilidad de múltiples fases, tres conceptos principales deben desarrollarse incluyendo la detección de fallos, el aislamiento de fallas y control tolerante a fallos. Por tanto, esta tesis doctoral se centra en la FD y control tolerante a fallos de un VSI multifase.Para lograr este objetivo la investigación, los productos alimenticios y bebidas y métodos de control que se presentan del convertidor de potencia se investigan a fondo a través de revisión de la literatura. Después de eso, se estudió la condición operativa del convertidor de múltiples el suministro de la máquina eléctrica.En cuanto a los métodos de FD en múltiples fases, tres nuevos algoritmos se presentan en esta tesis. Estos métodos FD propuestas también están integrados en los nuevos algoritmos de control con tolerancia a fallos. En el primer paso, se propone un método FD modelo novela basada detectar fallas múltiples del interruptor abierto. Este método FD está incluido en el algoritmo de control adaptativo desarrollado proporcional resonante del convertidor de potencia.En el segundo paso, se proponen dos métodos FD señal basada. Se discute el control tolerante a fallos del convertidor de potencia con el controlador PI convencional. Además, la teoría de la SMC se desarrolla. En el último paso, el control conjunto finito modelo de control predictivo del motor de cinco fases sin escobillas de corriente continua se discutió por primera vez en estatesis. Un método FD sencilla se deriva de las señales de control. Las entradas a todos los métodos desarrollados son las corrientes de cinco de fase del motor.La teoría de cada método se explica y se compara con los métodos disponibles. Paravalidar la teoría desarrollada en cada parte, FD algoritmo está incorporado en el algoritmo de control tolerante a fallos. Los resultados experimentales se llevan a cabo en una unidad de motor BLDC de cinco fases. El motor eléctrico usado en los resultados experimentales tiene una estructura de rotor exterior en las cuatro ruedas. Este motor es adecuado para los vehículos eléctricos. Al final de cada parte, se presentan los puntos notables y conclusiones.

    There is an increasing demand for vehicles with less environmental impact and higher fuel efficiency. To meet these requirements, the transportation electrification has been introduced in both academia and industry during last years. Electric vehicle (EV) and hybrid Electric vehicle (HEV) are two practical examples in transportation systems. The typical power train in the EVs consists of three main parts including energy source, power electronics and an electrical motor. Regarding the machine, permanent magnet (PM) motors are the dominant choice for light duty hybrid vehicles in industry due to their higher efficiency and power density. In order to operate the power train, the electrical machine can be supplied and controlled by a voltage source inverter (VSI). The converter is subjected to various fault types. According to the statistics, 38% of faults in a motor drive are due to the power converter. On the other side, the electrical power train should meet a high level of reliability. Multiphase PM machines can meet the reliability requirements due to their fault-tolerant characteristics. The machine can still be operational with faults in multiple phases. Consequently, to realize a multiphase fault-tolerant motor drive, three main concepts should be developed including fault detection (FD), fault isolation and fault-tolerant control. This PhD thesis is therefore focused on FD and fault-tolerant control of a multiphase VSI. To achieve this research goal, the presented FD and control methods of the power converter are thoroughly investigated through literature review. Following that, the operational condition of the multiphase converter supplying the electrical machine is studied. Regarding FD methods in multiphase, three new algorithms are presented in this thesis. These proposed FD methods are also embedded in new fault-tolerant control algorithms. At the first step, a novel model based FD method is proposed to detect multiple open switch faults. This FD method is included in the developed adaptive proportional resonant control algorithm of the power converter. At the second step, two signal based FD methods are proposed. Fault-tolerant control of the power converter with the conventional PI controller is discussed. Furthermore, the theory of SMC is developed. At the last step, finite control set (FCS) model predictive control (MPC) of the five-phase brushless direct current (BLDC) motor is discussed for the first time in this thesis. A simple FD method is derived from the control signals. Inputs to all developed methods are the five-phase currents of the motor. The theory of each method is explained and compared with available methods. To validate the developed theory at each part, FD algorithm is embedded in the fault-tolerant control algorithm. Experimental results are conducted on a five-phase BLDC motor drive. The electrical motor used in the experimental results has an in-wheel outer rotor structure. This motor is suitable for electric vehicles. At the end of each part, the remarkable points and conclusions are presented

    Hay una creciente demanda de vehículos con menor impacto ambiental y una mayor eficiencia de combustible. Para cumplir estos requisitos, la electrificación del transporte se ha introducido en la academia y la industria en los últimos años. Vehículos eléctricos y vehículos eléctricos híbridos son dos ejemplos prácticos en los sistemas de transporte. El tren de potencia típico en los vehículos eléctricos se compone de tres partes principales, incluyendo la fuente de energía, la electrónica de potencia y un motor eléctrico. En cuanto a la máquina, de imán permanente motores son la opción dominante para vehículos híbridos ligeros en la industria debido a su mayor eficiencia y densidad de potencia. Con el fin de operar el tren de potencia, la máquina eléctrica se puede suministrar y controlado por un inversor de fuente de tensión. El convertidor se somete a diversos tipos de fallos. Según las estadísticas, 38 % de las fallas en un motor se deben al convertidor de potencia. Por otro lado, el tren de potencia eléctrica debe cumplir con un alto nivel de fiabilidad. Máquinas multifase PM pueden cumplir con los requisitos de fiabilidad debido a sus características de tolerancia a fallos. La máquina puede seguir siendo operativo con fallas en múltiples fases. En consecuencia, para realizar una unidad de motor de alta disponibilidad de múltiples fases, tres conceptos principales deben desarrollarse incluyendo la detección de fallos, el aislamiento de fallas y control tolerante a fallos. Por tanto, esta tesis doctoral se centra en la FD y control tolerante a fallos de un VSI multifase. Para lograr este objetivo la investigación, los productos alimenticios y bebidas y métodos de control que se presentan del convertidor de potencia se investigan a fondo a través de revisión de la literatura. Después de eso, se estudió la condición operativa del convertidor de múltiples el suministro de la máquina eléctrica. En cuanto a los métodos de FD en múltiples fases, tres nuevos algoritmos se presentan en esta tesis. Estos métodos FD propuestas también están integrados en los nuevos algoritmos de control con tolerancia a fallos. En el primer paso, se propone un método FD modelo novela basada detectar fallas múltiples del interruptor abierto. Este método FD está incluido en el algoritmo de control adaptativo desarrollado proporcional resonante del convertidor de potencia. En el segundo paso, se proponen dos métodos FD señal basada. Se discute el control tolerante a fallos del convertidor de potencia con el controlador PI convencional. Además, la teoría de la SMC se desarrolla. En el último paso, el control conjunto finito modelo de control predictivo del motor de cinco fases sin escobillas de corriente continua se discutió por primera vez en esta tesis. Un método FD sencilla se deriva de las señales de control. Las entradas a todos los métodos desarrollados son las corrientes de cinco de fase del motor. La teoría de cada método se explica y se compara con los métodos disponibles. Para validar la teoría desarrollada en cada parte, FD algoritmo está incorporado en el algoritmo de control tolerante a fallos. Los resultados experimentales se llevan a cabo en una unidad de motor BLDC de cinco fases. El motor eléctrico usado en los resultados experimentales tiene una estructura de rotor exterior en las cuatro ruedas. Este motor es adecuado para los vehículos eléctricos. Al final de cada parte, se presentan los puntos notables y conclusiones

  • On Performance Advances of Flying Capacitor Multilevel Converter Topologies

     Amer Mohammad Yusuf Mohammad Ghias
    The University of New South Wales
    Theses

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    The main focus of this thesis is to develop advanced modulation and voltage balancing methods for multilevel converter topologies, able to achieve stiff capacitor voltage regulation and reduce switching power losses of the converters. The study is focused on multilevel converter topologies based on flying capacitors (FCs), such as the multilevel flying capacitor converter (FCC) and the stacked multicell converter. Two modulation strategies are investigated; phase-shifted PWM and phase-disposition PWM, and improved voltage balancing methods have been developed and incorporated to these modulation techniques. The analysis of the converter is conducted in terms of switching frequency reduction, power losses, total harmonic distortion, and capacitor voltage ripples. This thesis also addresses the initial charging of FCs in grid-connected applications. A novel method for precharging the capacitors in the multilevel FCC is presented. The method can charge the capacitors in a controlled way besides producing low voltage and current stress to the power devices and the passive components. The method is simple and can be implemented and can be applied to FCCs with any number of levels. All the methods proposed in this thesis have been tested by simulation and experimental tests.

  • Fault Tolerant Vector Control of Five-Phase Permanent Magnet Motors

     Salehi Arashloo Arashloo, Ramin
    Department of Electronic Engineering, Universitat Politècnica de Catalunya
    Theses

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    Equipado con las estrategias de control adecuadas, los motores de imanes permanentes (PM motors) son de los tipos más flexibles de actuadores en muchas aplicaciones industriales. Entre diferentes tipos de estas máquinas, las maquinas BLDC con cinco fases son muy interesantes para aplicaciones tolerantes a fallos.En estas máquinas, la mejora del par puede llevarse a cabo mediante la optimización del diseño de la maquina o mediante la mejora de métodos de control.En esta tesis, se proponen nuevos controladores de corriente para mejorar la calidad del par generado en las condiciones normales de un BLDC pentafasico.Controladores propuestos se basan en una combinación de controladores predictivos (Model Predictie Control), y estimadores avanzados como 'Extended Kalman Filter'.Estos controladores serán una base para funcionamiento del motor bajo condiciones defectuosas.En este estudio, también se ha considerado el funcionamiento de máquinas BLDC pentafasicas en condiciones defectuosas. Para mejorar el par generado bajo condiciones defectuosas, la amplitud y ángulo del primer y tercer harmónicos de corrientes se han optimizado para las fases sanas. En condiciones defectuosas, las consignas de corriente apropiadas tienen dinámicas oscilantes y periódicos.Como resultado, en estas condiciones, los controladores implementados deben ser robustos y rápidos. En este estudio, también se proponen controladores predictivos para las condiciones defectuosas de la maquina BLDC de cinco fases.Las maquinas BLDC pentafasicas son muy interesantes para aplicaciones de automoción como vehículos eléctricos y aviones más eléctricos. En todas estas aplicaciones, la eficiencia de la maquina es muy importante. En esta tesis, la eficiencia de una maquina BLDC pentafasica se evalúa para condiciones normales, y también para condiciones defectuosas.Para verificar las teorías desarrolladas, siempre evaluaciones experimentales se llevan a cabo. Estas teorías incluyen métodos propuestos para controlar las corrientes, y la eficiencia simulada de la maquina bajo diferentes condiciones de operación.

  • Sliding mode control of a three-phase four-wire LCL rectifier

     Biel Sole, Domingo; Doria Cerezo, Arnau; Fossas Colet, Enric
    International Workshop on Variable Structure Systems
    p. 1-5
    DOI: 10.1109/VSS.2014.6881139
    Presentation's date: 2014-06-29
    Presentation of work at congresses

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    In this paper a control algorithm for a three-phase four-wire rectifier with an inductive-capacitive-inductive filter is presented. The control scheme consists in an inner current loop designed using the Sliding Mode Control technique, and an two external loops that regulates the DC bus voltage and also keeps the split bus balanced. Numerical simulations are also provided to show the performance of the closed loop. © 2014 IEEE.

  • Fixed switching frequency sliding mode control using an hysteresis band controller

     Repecho Del Corral, Victor; Biel Sole, Domingo; Fossas Colet, Enric
    International Workshop on Variable Structure Systems
    p. 6881146-1-6881146-6
    DOI: 10.1109/VSS.2014.6881146
    Presentation's date: 2014-06
    Presentation of work at congresses

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    This paper presents a hysteresis band controller in charge of fixing the switching frequency of a sliding mode controller. The proposed control measures the switching period of the control signal and modifies the hysteresis band of the comparator to regulate the switching frequency of the sliding motion. The switching frequency control system is modelled and a design criterion of the control parameters is derived to guarantee the closed loop stability.

  • Sliding mode control of a three-phase three-wire LCL rectifier

     Biel Sole, Domingo; Doria Cerezo, Arnau; Repecho Del Corral, Victor; Fossas Colet, Enric
    IEEE International Symposium on Industrial Electronics
    p. 661-666
    DOI: 10.1109/ISIE.2014.6864690
    Presentation's date: 2014-06-01
    Presentation of work at congresses

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    This paper presents a dynamic analysis and the control design for a three-phase three-wire unity power factor rectifier with a LCL filter. The control algorithm is based on the sliding mode control techniques that provides good tracking performance and robustness with respect to parameter variations, and a PI controller to regulate the DC voltage. The sliding control design uses a decoupling matrix to solve the algebraic constraint on the grid currents. The control law has been tested in numerical simulations with satisfactory results. © 2014 IEEE.

  • Advances in non-radiative resonant inductive coupling wireless power transfer: a comparison of alternative circuit and system models driven by emergent applications

     Bou Balust, Elisenda; Sedwick, Raymond; Hu, Patrick; Alarcon Cot, Eduardo Jose
    IEEE International Symposium on Circuits and Systems
    p. 2037-2040
    DOI: 10.1109/ISCAS.2014.6865565
    Presentation's date: 2014-06-01
    Presentation of work at congresses

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    Recent research in wireless power transfer (WPT) using resonant inductive coupling has demonstrated very high efficiencies at large distances compared to the transmitting element dimensions, thereby increasing the number of potential applications of WPT. Since resonant inductive coupling is a very multidisciplinary field of research, different approaches have been proposed to predict the behaviour of these systems from the physical theory of resonators (coupled-mode theory) and circuit theory. Although the equivalence of these models for a point-to-point link has already been studied together with the performance metrics Power Transferred to the Load (PTL) and Power Transfer Efficiency (PTE), the new challenges and applications of this technology emphasize the necessity of analytical models to predict and assess the behavior of Multiple Input - Multiple Output (MIMO) links. In this article we revisit the current analytical models from the MIMO perspective, derive the analytical equations for the equivalent performance metrics PTE and PTL and demonstrate how to maximize them in a non-radiative resonant wireless power transfer link from a circuit-centric point of view, providing design guidelines in terms of optimal source and load impedances. This work concludes with a prospective discussion on open challenges of WPT. © 2014 IEEE.

  • Unveiling nonlinear dynamics in resonant inductively coupled wireless power transfer

     Bou Balust, Elisenda; El Aroudi, Abdelali; Fisher, Peter; Alarcon Cot, Eduardo Jose
    IEEE International Symposium on Circuits and Systems
    p. 2612-2615
    DOI: 10.1109/ISCAS.2014.6865708
    Presentation's date: 2014-06-01
    Presentation of work at congresses

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    Coupled magnetic resonance is considered to be a key enabling technology for mid-range wireless power transfer. Models and systems have hitherto considered linear resonators as underlying dynamics, thereby limiting practical deployability due to the extreme sensitivity in front of parameter mismatch and resonance detuning. In this work, structural nonlinear modeling of constituent elements of the resonant link-resonant coils- is considered to unveil the existence of nonlinear dynamic regimes. The methodology considered to explore the nonlinear behavior is based on a behavioral model consisting of state equations, Floquet theory and Filippov method to study the stability of the periodic regime through the associated monodromy matrix. The ultimate aim of the investigation is a design-oriented parameter space exploration which characterizes the border of occurrence of the different dynamic modes in wireless power transfer links. © 2014 IEEE.

  • Circuit area optimization in energy temporal sparse scenarios for multiple harvester powered systems

     Gomez Cid-fuentes, Raul; Cabellos Aparicio, Alberto; Alarcon Cot, Eduardo Jose
    IEEE International Symposium on Circuits and Systems
    p. 2486-2489
    DOI: 10.1109/ISCAS.2014.6865677
    Presentation's date: 2014-06-01
    Presentation of work at congresses

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    Multi-source energy harvesters are gaining interest as a robust alternative to power wireless sensors, since the sensor node can maintain its operation regardless of the fact that one of its energy sources might be temporarily unavailable. Interestingly, and less explored, when the energy availability of the energy sources present large temporal variations, combining multiple energy sources reduce the overall sparsity. As a result, the performance of a multiple energy harvester powered sensor node is significantly better compared to a single energy source which harvests the same amount of energy. In this context, a circuit area optimization framework for multiple source energy harvesting powered systems is proposed. This framework takes advantage of this improvement in performance to provide the optimal amount of energy harvesters, the requirements of each energy harvester and the required energy buffer capacity, such that the overall area or volume is minimized. As the results show, by conducting a joint design of the energy harvesters and the energy buffer, the overall area or volume of a sensor node can be significantly reduced. © 2014 IEEE.

  • Access to the full text
    Gestión de energía en sistemas híbridos Red-PV-diesel en el proyecto MED-Solar  Open access

     Velasco Quesada, Guillermo; Casellas Beneyto, Francisco; Guinjoan Gispert, Francisco; Pique Lopez, Robert; Martínez García, Herminio; Pineau, A.; Graillot, A.
    Seminario Anual de Automática, Electrónica Industrial e Instrumentación
    p. 3010.1-3010.6
    Presentation's date: 2014-06-26
    Presentation of work at congresses

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    El presente trabajo aborda el diseño de la estructura de un sistema de gestión de energía eléctrica aplicable a sistemas eléctricos híbridos formados por la red eléctrica y sistemas de generación fotovoltaica, generación diésel y almacenamiento. La implementación de estos sistemas híbridos y sus sistemas de gestión será, dentro del marco del Proyecto MED-Solar, en tres países del área del Máshrek (Líbano, Palestina y Jordania), con el fin de demostrar que este tipo de instalaciones puede reducir parte de la problemática energética presente en estos países y, por tanto, mostrarse atractiva para diversos sectores económicos.

  • Banco de pruebas para verificar el rendimiento estático y dinámico del MPPT

     Velasco Quesada, Guillermo; Casellas Beneyto, Francisco; Guinjoan Gispert, Francisco; Pique Lopez, Robert
    Seminario Anual de Automática, Electrónica Industrial e Instrumentación
    p. 3016.1-3016.6
    DOI: -
    Presentation's date: 2014-06-26
    Presentation of work at congresses

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  • Simulación mediante ¿hardware in the loop¿ de un convertidor buck

     Velasco Quesada, Guillermo; Casellas Beneyto, Francisco; Guinjoan Gispert, Francisco; Esteban, Jordi; Martínez García, Herminio; Pique Lopez, Robert
    Seminario Anual de Automática, Electrónica Industrial e Instrumentación
    p. 6007.1-6007.5
    Presentation's date: 2014-06-26
    Presentation of work at congresses

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  • Fuzzy logic controller design for battery energy management in a grid connected electro-thermal microgrid

     Arcos Aviles, Diego Gustavo; Vega Muñoz, Christian; Guinjoan Gispert, Francisco; Marroyo Palomo, Luis; Sanchis Gúrpide, Pablo
    IEEE International Symposium on Industrial Electronics
    p. 2014-2019
    DOI: 10.1109/ISIE.2014.6864926
    Presentation's date: 2014-06-01
    Presentation of work at congresses

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    A fuzzy logic controller strategy for battery energy management in a grid connected electro-thermal residential microgrid is presented. The fuzzy control policy manages the power of the microgrid storage elements in order to minimize a set of quality indices involving, among others, the power profile exchanged with the mains. Numerical simulations using real measured data generation and consumption are provided to both validate the control design and to highlight the benefits of including thermal elements in the overall energy management strategy of the system. © 2014 IEEE.

  • 17è Premi a la Qualitat en la Docència Universitària del Consell Social de la UPC al `Grau en Enginyeria de Sistemes TIC¿

     Palà Schönwälder, Pere; Argelaguet Isanta, Maria Rosa; Barcons Xixons, Victor; Bonet Dalmau, Jordi; del Águila López, Francisco; Escobet Canal, Teresa; Escobet Canal, Antoni; Font Teixido, Jose; Giralt Mas, M. Rosa; Lopez Riera, Alexis; Llusà Serra, Aleix; Martinez Teixidor, Inmaculada; Tarres Puertas, Marta Isabel; Vicente Rodrigo, Jesús; Vila Marta, Sebastian
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  • SiC modular multilevel converters: sub-module voltage ripple analysis and efficiency estimations

     Perez Basante, Angel; Pou Felix, Josep; Ceballos Recio, Salvador; Gil De Muro, Asier; Pujana, Ainhoa; Ibañez, Pedro
    International Exhibition & Conference for Power Electronics Intelligent Motion Power Quality
    p. 1418-1425
    Presentation's date: 2014-05
    Presentation of work at congresses

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    Two important technical challenges associated with the Modular Multilevel Converter (MMC) are the reduction of the voltage ripple of the Sub-Module (SM) capacitors and the reduction of the converter losses. This paper conducts a study focused on these two topics. Firstly, the effect of a circulating current with a predefined second harmonic on the SM voltage ripple is assessed. Secondly, an efficiency study for two different MMCs, one with silicon (Si) and the other with silicon carbide (SiC) devices is carried out. Results suggest that a SiC MMC converter with a circulating current including a second harmonic represent a good solution since it achieves a reduction of the SM capacitors together with a high efficiency operation.

  • Comparison of phase-shifted and level-shifted PWM in the modular multilevel converter

     Darus, Rosheila; Konstantinou, Georgios; Pou Felix, Josep; Ceballos Recio, Salvador; Agelidis, Vassilios
    International Power Electronics Conference
    p. 3764-3770
    DOI: 10.1109/IPEC.2014.6870039
    Presentation's date: 2014-05-18
    Presentation of work at congresses

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    This paper reports a comparison study of different carrier-based PWM techniques applied to the modular multilevel converter. Phase-disposition PWM (PD-PWM) and phase-shifted pulse-width modulation (PS-PWM) with non-interleaving and interleaving are considered in this study. In PS-PWM, two cases are evaluated. In the first case, the particular SMs that have to be activated/deactivated are defined by a voltage balancing algorithm, which is the same one implemented in PD-PWM. In addition, an algorithm to restrict the number of switching SMs is also implemented to reduce the switching frequency of the power devices. In the other case of PS-PWM, each sub-module (SM) has a carrier signal associated to it and capacitor voltage balance is achieved by individual control of its capacitor voltage. The circulating current is controlled to be a dc component in all the cases. Simulation and experimental results are presented to evaluate the quality of the line-to-line output voltages and SM capacitor voltage ripples for the different cases under study. © 2014 IEEE.

  • A rolling horizon rescheduling strategy for flexible energy in a microgrid

     Marietta, Martín Pablo; Graells Sobre, Moises; Guerrero Zapata, Josep Maria
    IEEE International Energy Conference and Exhibition
    Presentation's date: 2014-05-16
    Presentation of work at congresses

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    In this work an Energy Management System (EMS) prototype for an isolated renewable-based microgrid is presented. The proposed management model not only considers the management of energy sources (generation) but also includes the possibility of flexible timing of energy consumptions (demand management) by modelling controllable and uncontrollable loads. The EMS consists of two stages: first a deterministic management model is formulated and subsequently is integrated into a rolling horizon control strategy, in which the actions on microgrid devices respond to an optimization criterion related to the estimation of the future system behaviour that is continually predicted by updatable forecasts in order to reduce uncertainty in both, production capacity and energy demand. Finally, this contribution presents and discusses a case study where the results of the operation with and without optimal demand management for the same group of loads are evaluated.

  • Varying and unequal carrier frequency PWM techniques for modular multilevel converters

     Konstantinou, Georgios; Darus, Rosheila; Pou Felix, Josep; Ceballos Recio, Salvador; Agelidis, Vassilios
    International Power Electronics Conference
    p. 3758-3763
    DOI: 10.1109/IPEC.2014.6870038
    Presentation's date: 2014-05
    Presentation of work at congresses

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    Carrier-based pulse-width modulation (PWM) strategies are commonly applied to modular multilevel converters (MMC). This paper proposes a modified PWM technique with unequal and varying carrier frequencies between consecutive levels. The variation between two consecutive carriers is calculated in order to maintain a constant average switching frequency regardless of modulation index and number of levels in the output. The proposed method effectively shifts the major harmonic content of output waveforms to higher frequencies at the cost of a slight increase in low order harmonics. Details on the derivation of the carrier frequencies as well as simulation and experimental results of the proposed method demonstrate the viability of the method as an alternative modulation technique for the MMC.

  • Nonlinear dynamics of an ambient noise driven array of coupled graphene nanostructured devices for energy harvesting

     El Aroudi, Abdelali; Lopez Suarez, Miquel; Alarcon Cot, Eduardo Jose; Rurali, Riccardo; Abadal, Gabriel
    International Conference on Structural Dynamics and Diagnosis
    p. 01001-1-01001-4
    DOI: 10.1051/matecconf/20141601001
    Presentation's date: 2014-05
    Presentation of work at congresses

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    Nonlinearities have been shown to play an important role in increasing the extracted energy of energy harvesting devices at the macro and micro scales. Vibration-based energy harvesting on the nano scale has also received attention. In this paper, we characterize the nonlinear dynamical behavior of an array of three coupled strained nanostructured graphene for its potential use in energy harvesting applications. The array is formed by three compressed vibrating membrane graphene sheet subject to external vibrational noise excitation. We present the continuous time dynamical model of the system in the form of a double-well three degree of freedom system. Random vibrations are considered as the main ambient energy source for the system and its performances in terms of the probability density function, RMS or amplitude value of the position, FFT spectra and state plane trajectories are presented in the steady state non-equilibrium regime when the noise level is considered as a control parameter.

  • Nonlinear dynamics and bifurcation behavior of a 2-DOF spring resonator with end stopper for energy harvesting

     El Aroudi, Abdelali; Blokhina, Elena; O'Connell, D.; Fu, B; Frizzell, R; Feely, Orla; Alarcon Cot, Eduardo Jose
    International Conference on Structural Dynamics and Diagnosis
    p. 08006-1-08006-6
    DOI: 10.1051/matecconf/20141608006
    Presentation's date: 2014-05
    Presentation of work at congresses

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    In this paper, the model of a two-degree-of-freedom (2-DOF) spring resonator with end stopper for an energy harvesting application is presented. Then we characterize its nonlinear dynamical behavior by numerical simulations when some suitable parameters are varied. The system is formed by two resonators subject to external vibrational excitation and with an end stopper. We present the continuous time dynamical model of the system in the form of a switched fourth order differential equation. Harmonic vibrations are considered as the main ambient energy source for the system and its frequency response representing the RMS value of the displacement is first computed. The dynamical behavior is unveiled by computing state-space trajectories, timedomain series and FFT spectra and frequency response as the excitation amplitude is varied.

  • Access to the full text
    Buoyancy model for Guanay II AUV  Open access

     Masmitja Rusiñol, Ivan; Gonzalez Agudelo, Julian; Gomariz Castro, Spartacus
    OCEANS MTS/IEEE
    Presentation's date: 2014-04-07
    Presentation of work at congresses

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    The AUV Guanay II is a vehicle developed by SARTI research group of Universitat Politècnica de Catalunya with the objective of providing a platform for measuring oceanographic variables, such as the temperature and salinity of the water column. In the vertical dive is important not to disturb the environment to avoid influencing in the measurements. For this reason a variable buoyancy (VB) system to do the vertical immersions has been designed. This paper presents the model designed to change the buoyancy of the vehicle and the tests both laboratory and field.

  • Integració de la competència de la tercera llengua en els estudis de grau

     Alsina Aubach, Montserrat; Argelaguet Isanta, Maria Rosa; Bonet Dalmau, Jordi; de las Heras Cisa, F. Xavier; del Águila López, Francisco; Fortuny Santos, Jordi; Franch Parella, Jorge; Gamisans Noguera, Javier; Giralt Mas, M. Rosa; Lao Luque, Concepcion; Martinez Teixidor, Inmaculada; Palà Schönwälder, Pere; Parcerisa Duocastella, David; Vicente Rodrigo, Jesús; Lopez Martinez, Joan Antoni; Soler Lorente, Monica; Vila Marta, Sebastian
    Higher Education Perspectives on CLIL
    p. 96
    Presentation's date: 2014-03-28
    Presentation of work at congresses

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  • Planificació de la impartició d'assignatures en anglès a l'EPSEM

     Alsina Aubach, Montserrat; Argelaguet Isanta, Maria Rosa; Martinez Teixidor, Inmaculada; Vicente Rodrigo, Jesús
    Higher Education Perspectives on CLIL
    p. 95
    Presentation's date: 2014-03-27
    Presentation of work at congresses

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  • An inverter dead-time feedforward compensation scheme for PMSM sensorless drive operation

     Diallo, Demba; Arias Pujol, Antoni; Cathelin, Joël
    International Conference on Green Energy
    p. 296-301
    DOI: 10.1109/ICGE.2014.6835438
    Presentation's date: 2014-03-25
    Presentation of work at congresses

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    In this paper, we propose a feedforward compensation scheme of the inverter dead-time to improve the performances of a sensorless Permanent Magnet Synchronous Machine (PMSM) drive at low speed and low load torque. Based on the identification of the duty cycle error due to the inverter dead-time an analytical expression depending on the phase currents is derived. It allows adjusting the input voltage of the Extended Kalman Filter that estimates the position and the speed. The experimental results in sensorless mode show a significant improvement in the position estimation, in the balance of the phase currents and also a reduction of the torque ripples while maintaining the torque average value. © 2014 IEEE.

  • A modified voltage balancing sorting algorithm for the modular multilevel converter: Evaluation for staircase and phase-disposition PWM

     Darus, Rosheila; Pou Felix, Josep; Konstantinou, Georgios; Ceballos Recio, Salvador; Agelidis, Vassilios
    IEEE Applied Power Electronics Conference and Exposition
    p. 255-260
    DOI: 10.1109/APEC.2014.6803318
    Presentation's date: 2014-03
    Presentation of work at congresses

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    This paper introduces a low complexity implementation of the voltage balancing sorting algorithm to reduce the switching frequency of the power devices in modular multilevel converters (MMCs). Two modulation techniques are evaluated; staircase modulation and phase-disposition pulse-width modulation (PD-PWM) under the conventional and the proposed algorithm. Using a circulating current controller in an MMC with 12 sub-modules per arm, PD-PWM yields better results compared to the staircase modulation technique. The test condition for this comparison is such that the power devices operate at a similar switching frequency and produce similar amplitudes to the capacitor voltage ripples in both modulation techniques. The results are verified through extensive simulations and experimentally using a phase-leg MMC laboratory prototype.

  • Contributions on corona onset voltage calculation for EHV and UHV substation connectors

     Hernandez Guiteras, Joan
    Universitat Politècnica de Catalunya
    Theses

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    Les investigacions realitzades en aquesta tesi es va realitzar en el marc d'un acord empresa - universitat . L'objectiu d'aquesta investigació és determinar la tensió d'inici de l'efecte corona en geometries no uniformes per evitar la seva aparició, i així poder incidir en la fase de disseny del connectors de subestació de EHV i UHV i equipmanet auxiliar de línia instal·lats en condicions de funcionament, d'acord amb les normes internacionals . Per tant , s'ha prestat una consideració especial a l'estudi i el modelatge de l'efecte corona per assegurar que els connectors dissenyats es trobin gairebé lliures d'aquest efecte indesitjable . Degut a de la natura d'aquest acord marc, la investigació científica s'ha vist delimitada a l'aplicabilitat en un entorn industrial a fi d'obtenir la accreditació, segons les normatives internacionals, dels productes analitzats.Per tant , els temes tractats en aquesta investigació inclouen l'anàlisi de camps electromagnètics i els càlculs de l'efecte corona , sent aquest últim de gran importància en el disseny dels connectors de subestació per EHV i UHV . És objectiu d'aquesta tesi proporcionar augmentar el coneixement i aportar mètodes matemàtics apropiats per avaluar el comportament dielèctric de connectors de subestació per a sistemes de transmissió de EHV i UHV . En concret , s'ha destinat un capítol a la introducció a l'estat de la tècnica en connectors de la subestació i l'efecte corona, seguit d'un capítol adreçat a l'estudi dels camps elèctrics i magnètics creats pels connectors de la subestació i les equacions empíriques per al càlcul de l'effecte corona. A continuació, s'introdueix una descripció macroscòpica del corona a través de la descripció matemàtica del procés de ionització, tant des del cas estacionari com el transitori. Seguit de la descripció microscòpica a través de funcions de distribució estadístiques utilitzdes per descriure i calcular els paràmetres d'ionització del corona en l'aire . Finalment, es troba el capítol de tancament amb les principals aportacions de la investigació realitzada.

  • RTC-2014-3089-3-Anualitat 2014

     Romeral Martinez, Jose Luis
    Competitive project

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  • Low cost photovoltaic array emulator design for the test of PV grid-connected inverters

     Chavarria Roe, Javier; Biel Sole, Domingo; Guinjoan Gispert, Francisco; Poveda Lopez, Alberto; Masana Nadal, Francisco; Alarcon Cot, Eduardo Jose
    International Multi-Conference on Systems, Signals and Devices
    p. 1-6
    DOI: 10.1109/SSD.2014.6808860
    Presentation's date: 2014-02-11
    Presentation of work at congresses

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    This paper presents a low cost photovoltaic array emulator design based on a DC-DC Boost converter. This design arises from the need to study in the laboratory new PV inverters based on SiC devices in order to improve their performances. The lack of space for installation of real photovoltaic panels and the high costs of the commercial emulators require of alternative systems which allow the reproduction of the characteristic curves of the panels as well as their dependence on changing environmental conditions. The emulator design is applied to a full-bridge single phase grid-connected inverter. Simulation results are provided to confirm the proper operation of the PV emulator. © 2014 IEEE.

  • Performance analysis of dual-frequency buck converter for integrated power management

     Shirmohammadli, V.; Saberkari, Alireza; Alarcon Cot, Eduardo Jose
    Power Electronics, Drive Systems and Technologies Conference
    p. 402-407
    DOI: 10.1109/PEDSTC.2014.6799409
    Presentation's date: 2014-02
    Presentation of work at congresses

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    The use of dual-frequency (DF) buck converter architecture consisting of a merged structure of high and low frequency buck cells is presented as a candidate topology for integrated power management to obtain favorable tradeoffs in terms of efficiency, switching ripple, and bandwidth. It is shown that having two degrees of freedom in designing the DF buck helps to achieve high efficiency and low output ripples, simultaneously. A comparison analysis is done with regards to the aforementioned performance indexes with the standard and three-level buck converters and the results are validated in HSPICE in a 0.35 µm CMOS process.

  • Enhanced high frequency injection algorithm for sensorless Sliding Mode Control PMSM drives

     Repecho Del Corral, Victor; Biel Sole, Domingo; Arias Pujol, Antoni
    International Multi-Conference on Systems, Signals and Devices
    p. 6808824-1-6808824-6
    DOI: 10.1109/SSD.2014.6808824
    Presentation's date: 2014-02
    Presentation of work at congresses

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    A high frequency injection (HF) based sensorless Sliding Mode Control (SMC) for Permanent Magnet Synchronous Machines (PMSMs) is presented. An analytical analysis, which demonstrates that the HF band is perturbed under sensorless operation, is addressed. Further increase of the sensorless control dynamics is achieved by removing the perturbed signals by means of compensation terms, which also estimate the PMSM aß inductance value. Numerical simulation results are presented, confirming the proper speed sensorless control at low speed reversal with load impact as well as under position control.

  • Class E2 resonant non-radiative wireless power transfer link: a design-oriented joint circuit-system co-characterization approach

     Bou Balust, Elisenda; Nagashima, Tomoharu; Sekiya, Hiroo; Alarcon Cot, Eduardo Jose
    International Multi-Conference on Systems, Signals and Devices
    p. 1-4
    DOI: 10.1109/SSD.2014.6808902
    Presentation's date: 2014-02-11
    Presentation of work at congresses

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    Resonant Inductive CouplingWireless Power Transfer is a key technology to provide an efficient and harmless wireless energy channel to consumer electronics, biomedical implants and wireless sensor networks. Many applications have been proposed for this technology, but the interplay between the Resonant Inductive Coupling magnetic link and the power electronics front-end is still unclear. In this paper, we propose a design-oriented joint circuit-system approach to design a high-efficiency resonant inductive coupling wireless power transfer link embedded in a class E2 DC-DC converter. © 2014 IEEE.

  • IPT-2011-1543-920000-Anualitat 2014

     Romeral Martinez, Jose Luis
    Competitive project

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  • Control avançat de sistemes d'energia

     Arias Pujol, Antoni; Batlle Arnau, Carles; Biel Sole, Domingo; Costa Castelló, Ramon; Doria Cerezo, Arnau; Fossas Colet, Enric; Franch Bullich, Jaime; Griño Cubero, Roberto; Husar, Attila Peter; Serra Prat, Maria; Cardoner Parpal, Rafael; Luna Pacho, Julio Alberto; Orellana Barcelo, Marcos; Repecho Del Corral, Victor; Strahl, Stephan; Olm Miras, Josep Maria
    Competitive project

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  • Centre d'enginyeria de processos, energia i medi ambient

     Espuña Camarasa, Antonio; Graells Sobre, Moises; Puigjaner Corbella, Lluis; Pérez Moya, Montserrat; de la Hoz Casas, Jordi; Matas Alcala, Jose; Castilla Fernandez, Miguel; Miret Tomas, Jaume; Guerrero Zapata, Josep Maria; Roca Mussons, Fco. Javier; Martin Cañadas, Maria Elena; Perales Lorente, Jose Francisco; Gallego Piñol, Eva; Guzman Sola, Ramon; Momeneh, Arash; Camacho Santiago, Antonio; Morales Lopez, Javier; Shokry, Ahmed F.; Diaz Molina, Jorge Ariel; Hjaila, Kefah; Silvente Saiz, Javier; Medina Gonzalez, Sergio Armando; Dombayci, Canan; Lupera Calahorrano, Gicela; Garcia de Vicuña Muñoz de la Nava, Jose Luis
    Competitive project

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